Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f017107e0dc3e2…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 17:40:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ad6c12cf20352ff4a1d5bbeb89880a56 SHA-1: 8c7c8cda1c5ace26144ba639e18bf818b568cf9a SHA-256: 45f017107e0dc3e2b84b692df8533c7e545bd9e11755284842784255ecc4a5f5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, promising free game currency or hacks for popular games like Roblox. It contains numerous links to external websites, many of which are hosted on domains associated with scam or link farm activities. The primary URL, http://netcdn.tw/app/431946152/roblox-gift-card-online-free-game-hack, is directly linked to this deceptive scheme. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest a phishing or scam campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/roblox-gift-card-online-free-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-scam-place_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-paying-money-or-typing-password_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/step-3-enjoy-your-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-witch-hat-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/testing-5-ways-to-get-free-robux-it-worked_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hack-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/login-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/script-cheat-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-shirt-design_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-hack-october-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-cheat-on-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/cheat-tool-jailbreak-pc-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-easy-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-2021-no-having-to-get-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E65 21952 bytes
SHA-256: 22c3d4765218f2d0755f0ee80cae18097af467ad36b8af34d92c4f788e688698
font_01_sfnt_off00005ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC0 19048 bytes
SHA-256: 55b46331afb2a8069782d8597c001b3c0c12b84d77f3d9baa1c75e4cada97544

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